Lassen Peak

Lassen Peak is the southernmost active volcano in the Cascade Range. Lassen rises 2,000 feet above the surrounding terrain and has a volume of half a cubic mile, making it one of the largest lava domes on Earth. Lassen Peak has the distinction of being the only volcano in the Cascades other than Mount St. Helens to erupt during the 20th century. On May 22, 1915, a powerful explosive eruption at Lassen Peak devastated nearby areas, and it rained volcanic ash as far away as 200 miles to the east. Unlike most lava domes, Lassen Peak is topped by craters. Lassen Peak has the highest known winter snowfall amounts in California, with annual snowfalls reaching more than 1,000 inches in some years at its base at "Lake Helen". A well-maintained class 1 route leads to the summit from Lake Helen.